EP3387495B1 - Split time counter mechanism - Google Patents

Split time counter mechanism Download PDF

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Publication number
EP3387495B1
EP3387495B1 EP16809185.8A EP16809185A EP3387495B1 EP 3387495 B1 EP3387495 B1 EP 3387495B1 EP 16809185 A EP16809185 A EP 16809185A EP 3387495 B1 EP3387495 B1 EP 3387495B1
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EP
European Patent Office
Prior art keywords
flyback
isolation
split
lever
claws
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Active
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EP16809185.8A
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German (de)
French (fr)
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EP3387495A1 (en
Inventor
Marc Lemonnier
Bertrand VALLET
Alexandre BENVEGNIN
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Publication of EP3387495A1 publication Critical patent/EP3387495A1/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0866—Special arrangements
    • G04F7/0876—Split-time function, e.g. rattrappante

Definitions

  • the present invention relates to a split-seconds mechanism intended to equip a split-seconds chronograph mechanism.
  • the split-second mechanism is a complementary mechanism to the chronograph mechanism allowing to drive a second second hand called split-second or simply split-second hand.
  • the split-second or split-second hand can move while remaining superimposed on the first chronograph hand, can be stopped without the chronograph hand being, then brought back to a position where it is again superimposed on the chronograph hand. on and finally can be stopped and reset at the same time as the chronograph hand.
  • the catch-up mechanism therefore allows the display of several successive times measured from the same origin, the reading time being able to be caught without disturbing the measurement.
  • the split-seconds hand is driven on the axis of the split-seconds wheel which is itself pivoted in the chronograph axis of the chronograph wheel.
  • the locking or indexing of the split-second hand and of the chronograph needle driven onto the chronograph axis is effected by means of a split-lever lever pivoted on the split-wheel and a split-second heart attached to the chronograph axis.
  • Known catch-up mechanisms are generally controlled by a pusher acting on a catch-up column wheel and comprise a catch-up clamp comprising two arms making it possible to block the catch-up wheel and two spouts cooperating with the catch-up column wheel.
  • a catch-up clamp comprising two arms making it possible to block the catch-up wheel and two spouts cooperating with the catch-up column wheel.
  • the split-lever In conventional split-back mechanisms without insulation, the split-lever is constantly in contact with the split-heart and slides or rolls over said split-heart when the split-wheel is locked and the split-heart turns driven by the axis chronograph.
  • the passage of the tip of the split-second heart causes a variation in amplitude and therefore a significant energy consumption.
  • Insulation mechanisms have therefore been developed which make it possible to isolate the catch-up lever from the catch-up heart when the catch-up clamp blocks the catch-up mobile.
  • These mechanisms generally include an isolation wheel pivoting on the split-second axis and provided with a pin to isolate the split-lever.
  • This isolation wheel is actuated when the split-second clamp is closed by means of an isolation arm (or an isolation octopus) controlled by the split-column wheel.
  • an isolation mechanism it is possible to limit the consumption of amplitude of the split-second lever when the split-second clamp is closed.
  • the addition of an insulation wheel pivoting on the split-second axis increases the thickness of the movement.
  • the isolation wheel actuated by its control arm or octopus is subjected to radial forces. These efforts are necessary to overcome the force of the split-second lever but result in longitudinal deformations on the split-second axis (bending deformations). These deformations are such that, in general, in an insulated split-back mechanism, the split-wheel must be pivoted in a split-deck to limit these deformations. The size of the mechanism is further increased.
  • the document EP 2 897 002 A2 describes a split-second mechanism according to the preamble of independent claim 1, and also comprising a diaphragm isolation mechanism.
  • the object of the present invention is to provide a split-back insulating mechanism which overcomes the aforementioned drawbacks.
  • the object of the present invention is to provide an insulated split-back mechanism which is less bulky than known insulated split-back mechanisms, preferably which is not more bulky than a conventional split-slip mechanism without insulation and which reduces the forces and deformations on the split-second axis when isolating the split-lever.
  • the present invention also relates to a chronograph mechanism provided with a split-seconds mechanism as above.
  • the split-seconds mechanism according to the present invention is an insulated split-seconds mechanism intended to equip a traditional chronograph mechanism.
  • the chronograph mechanism comprises in particular a chronograph wheel and a chronograph heart secured to a chronograph axis. Said chronograph axis still carries a chronograph hand.
  • the split-second mechanism comprises a split-heart 1 driven on the chronograph axis of the chronograph mechanism and a split-wheel 3 whose split-second axis traditionally pivots in said chronograph axis.
  • split-lever 4 On the split-second wheel 3 is pivoted a split-lever 4.
  • the split-lever 4 can be pivotally mounted around a first lug 5 which is itself driven into the split-wheel 3.
  • the split-second axis 2 of the split-second wheel 3 carries a split-second hand (not shown) which, viewed from the dial side of the chronograph mechanism, is placed on the chronograph needle.
  • the split-second lever 4 comprises a first arm 6 carrying at its end a tenon 7 intended to cooperate with the free end 8 of a split-lever lever return spring 9 fixed in the plank of the split-wheel 3 by means of 'a screw 10 for example.
  • the split-second lever 4 also has a second arm 11 whose active end 12 is intended to cooperate with the split-back core 1.
  • the active end 12 of the split-back lever 4 has a flat portion 15 perpendicular to the plane of said lever 4.
  • the active end 12 carries an indexing roller 16 pivotally mounted around a first peg 17 itself driven into said active end 12.
  • Said first peg 17 forms an axis of rotation perpendicular to the plane of the split-second lever 4 for the indexing roller 16 and is driven into said lever 4 so that said indexing roller 16 projects substantially from the planar portion 15 in the longitudinal axis of the lever and so that the planar portion 15 extends substantially on either side of said indexing roller 16.
  • the flat portion 15 may consist of a flat face coming from a part, such as a tile or a ruby palette for example or of them flat faces placed on either side of the indexing roller 16.
  • References 15 to 17 are illustrated on the figure 1 only. Only the reference 12 indicating the active end of the split-back lever 4 is illustrated in the rest of the figures. It is obvious that the active end 12 of the split-second lever 4 could have any other suitable shape.
  • the split-second mechanism also conventionally comprises locking clamps 18 intended to cooperate with the split-second wheel 3 to block and release the latter.
  • the locking clamps 18 comprise for example two concurrent locking arms and pivoting at their point of intersection A on a bridge of the chronograph movement between a first open position in which the split-second wheel 3 is free ( figures 1 to 4 ) and a second closed position in which the locking clamps 18 cooperate with the split-second wheel 3 to immobilize the latter.
  • the free end of the locking clamps 18 is intended to cooperate with the teeth of the split-second wheel 3 to immobilize the latter in the closed position of said locking clamps 18.
  • said free end of the clamps blocking 18 may have a notched profile as illustrated in the figures.
  • the locking clamps 18 are integral with a pair of spouts 19 also pivoting at A and arranged to cooperate with a split-column wheel 20 to control the pivoting of the locking clamps 18.
  • the locking clamps 18 are in the open position ( figures 1 to 4 ) while when the spouts 19 are between the columns of the split-seat column wheel 20, the locking pliers 18 are in the closed position and the split-back wheel 3 immobilized ( Figures 5 to 12 ).
  • the split-seconds column wheel 20 is pivotally mounted on a bridge or the plate of the chronograph mechanism and is controlled by a control mechanism (not illustrated) which can be actuated by the user by means of a push-button for example, when the latter wants to measure an intermediate time or catch up with the measurement of the chronograph hand.
  • a control mechanism (not illustrated) which can be actuated by the user by means of a push-button for example, when the latter wants to measure an intermediate time or catch up with the measurement of the chronograph hand.
  • This control mechanism is not illustrated and will not be described in more detail.
  • the split-second mechanism according to the invention further comprises an isolation mechanism which makes the particularity of the invention.
  • This isolation mechanism includes isolation clips 21.
  • the insulation clips 21 are formed by two concurrent arms and pivoted at their intersection on a bridge or the plate of the chronograph mechanism.
  • the arms of the isolation clamps 21 are arranged to pivot between a first open position (the two arms of the isolation clamps are separated from one another) and a second closed position (the two arms of the isolation clamps are close to each other).
  • the insulation clamps 21 cooperate with the split-back lever 4 to rotate it into a position in which it is no longer in contact with the split-back heart 1 whatever the position of said split-back heart 1
  • the split-back lever 4 is therefore isolated from the split-back heart 1 which can pivot without coming into contact with said split-back lever 4.
  • the isolation clamps 21 are pivoted at A concentrically with the locking clamps 18 and each of the arms forming the isolation clamps 21 came in one piece with one of the spouts 19.
  • the locking clips 18 are flexible and are carried by the isolation clips 21.
  • each of the arms of the locking clips 18 is fixed to an arm of the isolation clips 21 to the by means of two pegs 18b for example.
  • each of the arms of the isolation clamps 21 has an active end 22 of circular shape and the isolation clamps 21 are arranged so that said active ends 22 are concentric with split-second axis 2 when the insulation clips 21 are in their second closed position.
  • the split-back lever 4 comprises a protuberance arranged to cooperate with the isolation clamps 21 in their closed position so that a pressing of the isolation clamps 21 on the protrusion causes the tilting lever 4 to pivot in a position in which it is no longer in contact with the split-second core 1.
  • the protuberance is a first insulating roller 13 pivotally mounted on the first arm 6 of said lever. split-second 4.
  • the insulation clamps 21 are subjected to the action of an elastic force which tends to move them into their closed position.
  • the elastic force consists of an insulation spring 23 pivoted at A concentrically with the insulation clips 21 and comprising two elastic arms each acting respectively on one arm of the insulation clips 21.
  • the figures 1 to 4 illustrate the split-seconds mechanism at rest, that is to say when the split-seconds hand and the chronograph hand are superimposed.
  • the spouts 19 are each in abutment against a column of the split-seat column wheel 20.
  • the locking clamps 18 and the insulation clamps 21 are in their open position.
  • the split-second lever 4 is supported on the split-core 1, the indexing roller 16 located in the hollow between the shoulders 1b of the split-core 1 while the flat portions 15 of the active end 12 of said lever split-second 4 are supported on said shoulders 1b, thus guaranteeing the indexing of the split-second hand with the chronograph hand.
  • the split-column wheel 20 pivots by one step.
  • the spouts 19 then each fall into a space between two columns of said split-seat column wheel 20 ( figure 5 ).
  • the fall of the spouts 19 causes the locking clips 18 and the isolation clips 21 to pivot from their open position to their closed position.
  • the split-second mechanism according to the invention is arranged so that the locking of the split-wheel 3 and the isolation of the split-lever 4 takes place in two successive phases, the locking clamps 18 reaching their closed position before the clamps d insulation 21 does not reach theirs.
  • a first blocking phase illustrated in the figure 5 the locking clamps 18 have already reached their closed position, immediately after the start of the fall of the spouts 19 between the columns of the column wheel 20 and therefore immobilize the split-second wheel 3 while the isolation clamps 21 do not have not yet pivoted the catch-up lever 4.
  • the catch-up needle is stopped. This avoids phase shifts or jolts of the split-second hand relative to the chronograph hand.
  • This type of phase shift or leaps forward of the split-second hand relative to the chronograph hand can occur in the case where the split-second lever is isolated before or simultaneously with the locking of the split-second wheel: in this case, for a short time, the split-second wheel is no longer linked to the chronograph mobile and the split-second hand is therefore free to rotate.
  • the spouts 19 continue their fall between the columns of the split-column wheel 20 and the insulating clamps 21 continue their rotation to reach their closed position in which they are pressed against the first insulating roller 13 of the lever split-second 4 and rotate said lever.
  • the split-second lever 4 therefore begins to move away from the split-heart 1.
  • the split-wheel 3 is always locked by the locking pliers 18.
  • the flexibility of said locking clamps 18 compensates for their additional rotation (since they are carried by the isolation clamps 21) and allows them to remain in abutment against the split-second wheel 3 without risk of breakage even if the radial force of the locking clamps 18 on the split-second wheel 3 increases.
  • the split-second mechanism reaches its blocking and complete isolation position during a third phase illustrated in figure 7a .
  • the isolation clamps 21 pivot until they come into abutment against two eccentrics 24.
  • This position in abutment against the eccentrics 24 corresponds then in the closed position of the isolation clamps 21 and the locking clamps 18.
  • the position of the eccentrics 24 can be adjusted so that in this closed position of the isolation clamps 21, the catch-up lever 4 is in a position in which it is completely isolated from the split-heart 1 which can pivot freely without contact with the active end 12 of the split-lever 4 and its indexing roller 16 in particular.
  • the split-seconds mechanism can be reset to zero relative to the chronograph hand, i.e. the split-second needle can be returned to its indexed position in which it is superimposed on the chronograph hand.
  • the actuation of the control mechanism by the user causes the pitching wheel of the split-second column wheel to rotate one pitch.
  • the spouts 19 come out of their housing between two columns to return each to rest on a column of the column wheel split-second 20.
  • the locking clips 18 and the insulation clips 21 then pivot and return to their open position.
  • the reindexing of the split-seconds hand on the chronograph hand is done in two stages. First, the isolation clamps 21 release the split-lever 4 which returns to contact with the split-core 1 under the action of its return spring 9. Then, the locking clamps 18 release the split-wheel 3.
  • the active end 12 of the catch-up lever 4 which is in contact with the catch-up heart 1, rolls (or slides) thereon until the indexing roller 16 falls into the hollow between the shoulders 1b of said split-second heart 1 and that the flat portion 15 cooperates with said shoulders 1b.
  • the split-second mechanism has returned to its rest position and the split-second hand and the chronograph hand are again superimposed.
  • the insulation clips 21 and their circular active end 22 do not form a complete circle around the split-second wheel 3 when said insulation clips 21 are in their closed position.
  • the isolation mechanism of the split-second mechanism further comprises an isolation lever 25 pivoted on the split-wheel 3.
  • the isolation lever 25 can be pivotally mounted around a second tenon 26 which is itself driven into the split-second wheel 3.
  • the isolation lever 25 carries at one end an isolation pin 27 arranged to move in a slot 14 formed in the second arm 11 of the split-back lever 4.
  • the other end of the isolation lever 25 has a protuberance which in the illustrated embodiment consists of a second insulation roller 28 pivoted on said insulation lever 25.
  • the second insulation roller 28 is arranged to cooperate with the clamps insulation 21 in their closed position.
  • the isolation lever 25, its isolation pin 27 and the slot 14 provided on the flap lever 4 are arranged so that pressing the isolation clips 21 on the second isolation roller 28 causes the pivoting of the isolation lever 25 around the second tenon 26 and the pivoting of the split-second lever 4 in a position in which the latter is no longer in contact with the split-second heart 1.
  • the isolation lever 25 and the split-second lever 4, and in particular the first and second insulation rollers 13, 28, are arranged so that there is always at least one of the first and second insulation rollers 13 , 28 in contact with the insulation clips 21 when these are in their closed position.
  • the catch-up lever 4 can be isolated from the catch-up heart during the measurement of an intermediate time whatever the position of the catch-up wheel 3 when the latter is locked by the locking clamps 18.
  • the figure 8 illustrates the case where, when the split-seconds mechanism is triggered (measurement of an intermediate time), the split-wheel 3 and the split-lever 4 are in a position in which the first insulating roller 13 is in the dead zone C and therefore cannot be reached by the isolation clamps 21 in the closed position.
  • the isolation clips 21 by pivoting in their closed position come into contact with the second isolation roller 28 which causes the isolation lever 25 to pivot.
  • the pivoting of said isolation lever 25 causes the displacement of the insulation pin 27 in the slot 14 of the split-second lever 4 and consequently the pivoting of said lever split-second 4 in a position in which it is no longer in contact with the split-heart 1.
  • the split-second lever 4, the isolation lever 25 and the first and second insulation rollers 13, 28 are arranged so that the insulation takes place even when one of said first and second insulation rollers 13, 28 comes to bear at the limit of an active end 22 of the insulation clamps 21 and therefore at the limit of a dead zone C or D (first insulation roller 13 at the limit of the insulation clamps 21 in the figures 10 and 11 , and second insulating roller 28 at the limit of the insulating clamps 21 in the figures 9 and 12 ).
  • the insulation clips are formed of two concurrent arms and pivoted at the same point which is their intersection.
  • the isolation clips could comprise two concurrent arms each pivoted at a distinct point different from their intersection, on a bridge or the plate of the chronograph mechanism.
  • the insulating clamps of the mechanism according to the invention are formed by two concurrent arms which can be brought together to cooperate with and "grip" the split-back lever 4.
  • the isolation clamps are pivoted coaxially with the locking clamps and are controlled simultaneously, the locking clamps being carried by the isolation clamps. It goes without saying that, as a variant, the insulation clips could be pivoted at another point of the movement, independently of the locking clips. Likewise, said insulation clamps could be controlled by the locking clamps or even directly controlled by the split-column wheel.
  • the locking clips are well known to those skilled in the art and could have any shape suitable for their function and could be completely independent of the insulation clips.
  • the shape of the active end of the flap lever described above is an example. It is obvious that said active end and the catch-up lever could have any suitable shape.
  • split-seconds mechanism with insulation is thus produced which makes it possible to limit or even eliminate the radial stresses on the split-second axis by providing concentric insulation with respect to the split-second wheel. It is therefore no longer necessary to pivot the split-second axis in a dedicated bridge or between two dedicated bridges.
  • the split-second mechanism according to the invention allows complete isolation of the lever which is no longer in contact with the split-second core during the measurement of an intermediate time, which makes it possible to limit the variation in amplitude. movement (no need to pass the tip of the heart for the split lever).
  • the split-back mechanism and its isolation mechanism according to the invention make it possible to keep the dimensions of a conventional split-mechanism without an insulator since by not using an isolation wheel, no additional thickness is added to the mechanism (the insulation clips working in the thickness of the split-lever).
  • the split-second mechanism according to the invention is relatively compact in terms of parts and size and is easily adjustable.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Description

La présente invention concerne un mécanisme de rattrapante destiné à équiper un mécanisme de chronographe à rattrapante.The present invention relates to a split-seconds mechanism intended to equip a split-seconds chronograph mechanism.

Le mécanisme de rattrapante est un mécanisme complémentaire au mécanisme de chronographe permettant d'entraîner une deuxième aiguille trotteuse appelée aiguille de rattrapante ou simplement rattrapante. La rattrapante ou aiguille de rattrapante peut se mouvoir en restant superposée à la première aiguille de chronographe, peut être arrêtée sans que l'aiguille de chronographe le soit, puis ramenée dans une position où elle est à nouveau superposée à l'aiguille de chronographe en marche et enfin peut être arrêtée et remise à zéro en même temps que l'aiguille de chronographe. Le mécanisme de rattrapante permet donc l'affichage de plusieurs temps successifs mesurés à partir de la même origine, le temps de lecture pouvant être rattrapé sans perturber la mesure.The split-second mechanism is a complementary mechanism to the chronograph mechanism allowing to drive a second second hand called split-second or simply split-second hand. The split-second or split-second hand can move while remaining superimposed on the first chronograph hand, can be stopped without the chronograph hand being, then brought back to a position where it is again superimposed on the chronograph hand. on and finally can be stopped and reset at the same time as the chronograph hand. The catch-up mechanism therefore allows the display of several successive times measured from the same origin, the reading time being able to be caught without disturbing the measurement.

L'aiguille de rattrapante est chassée sur l'axe de la roue de rattrapante qui est lui-même pivoté dans l'axe de chronographe de la roue de chronographe. Dans les mécanismes de rattrapante connus, le verrouillage ou indexage de l'aiguille de rattrapante et de l'aiguille de chronographe chassée sur l'axe de chronographe s'effectue par l'intermédiaire d'un levier de rattrapante pivoté sur la roue de rattrapante et d'un cœur de rattrapante solidaire de l'axe de chronographe.The split-seconds hand is driven on the axis of the split-seconds wheel which is itself pivoted in the chronograph axis of the chronograph wheel. In known split-seconds mechanisms, the locking or indexing of the split-second hand and of the chronograph needle driven onto the chronograph axis is effected by means of a split-lever lever pivoted on the split-wheel and a split-second heart attached to the chronograph axis.

Les mécanismes de rattrapante connus sont en général commandés par un poussoir agissant sur une roue à colonnes de rattrapante et comprennent une pince de rattrapante comportant deux bras permettant de bloquer la roue de rattrapante et deux becs coopérant avec la roue à colonnes de rattrapante. Lorsque les becs de la pince de rattrapante sont en appui contre des colonnes de la roue à colonnes, les deux bras de la pince de rattrapante sont écartés et la roue de rattrapante est libérée. Le mobile de rattrapante est alors solidaire du mobile de chronographe grâce au levier de rattrapante et les aiguilles de rattrapante et de chronographe sont superposées. Lorsque les becs de la pince de rattrapante tombent entre deux colonnes de la roue à colonnes, les bras de la pince se ferment et immobilisent la roue de rattrapante ce qui arrête l'aiguille de rattrapante. L'aiguille de chronographe continue sa rotation librement.Known catch-up mechanisms are generally controlled by a pusher acting on a catch-up column wheel and comprise a catch-up clamp comprising two arms making it possible to block the catch-up wheel and two spouts cooperating with the catch-up column wheel. When the jaws of the split-second gripper are in abutment against columns of the column wheel, the two arms of the split-grip clamp are separated and the split-wheel is released. The split-second mobile is then secured to the chronograph mobile thanks to the split-lever and the split-hand and chronograph are superimposed. When the jaws of the split-second pliers fall between two columns of the column wheel, the arms of the clamp close and immobilize the split-back wheel which stops the split-second needle. The chronograph hand continues to rotate freely.

Dans les mécanismes de rattrapante classiques sans isolation, le levier de rattrapante est constamment en contact avec le cœur de rattrapante et glisse ou roule sur ledit cœur de rattrapante lorsque la roue de rattrapante est bloquée et que le cœur de rattrapante tourne entraîné par l'axe de chronographe. Cependant, le passage de la pointe du cœur de rattrapante entraîne une variation d'amplitude et par conséquent une consommation d'énergie importante.In conventional split-back mechanisms without insulation, the split-lever is constantly in contact with the split-heart and slides or rolls over said split-heart when the split-wheel is locked and the split-heart turns driven by the axis chronograph. However, the passage of the tip of the split-second heart causes a variation in amplitude and therefore a significant energy consumption.

Il a donc été développé des mécanismes d'isolation permettant d'isoler le levier de rattrapante du cœur de rattrapante lorsque la pince de rattrapante bloque le mobile de rattrapante. Ces mécanismes comprennent en général une roue d'isolation pivotant sur l'axe de rattrapante et munie d'une goupille pour isoler le levier de rattrapante. Cette roue d'isolation est actionnée à la fermeture de la pince de rattrapante par le biais d'un bras d'isolation (ou d'une pieuvre d'isolation) commandé par la roue à colonnes de rattrapante. Ainsi, avec un tel mécanisme d'isolation, il est possible de limiter la consommation d'amplitude du levier de rattrapante lorsque la pince de rattrapante est fermée. Cependant, l'ajout d'une roue d'isolation pivotant sur l'axe de rattrapante augmente l'épaisseur du mouvement. De plus, lors de l'isolation, la roue d'isolation actionnée par son bras ou sa pieuvre de commande est soumise à des efforts radiaux. Ces efforts sont nécessaires pour vaincre la force du levier de rattrapante mais se traduisent par des déformations longitudinales sur l'axe de rattrapante (déformations en flexion). Ces déformations sont telles qu'en général, dans un mécanisme de rattrapante à isolation, la roue de rattrapante doit être pivotée dans un pont de rattrapante pour limiter ces déformations. L'encombrement du mécanisme s'en voit encore augmenté.Insulation mechanisms have therefore been developed which make it possible to isolate the catch-up lever from the catch-up heart when the catch-up clamp blocks the catch-up mobile. These mechanisms generally include an isolation wheel pivoting on the split-second axis and provided with a pin to isolate the split-lever. This isolation wheel is actuated when the split-second clamp is closed by means of an isolation arm (or an isolation octopus) controlled by the split-column wheel. Thus, with such an isolation mechanism, it is possible to limit the consumption of amplitude of the split-second lever when the split-second clamp is closed. However, the addition of an insulation wheel pivoting on the split-second axis increases the thickness of the movement. In addition, during insulation, the isolation wheel actuated by its control arm or octopus is subjected to radial forces. These efforts are necessary to overcome the force of the split-second lever but result in longitudinal deformations on the split-second axis (bending deformations). These deformations are such that, in general, in an insulated split-back mechanism, the split-wheel must be pivoted in a split-deck to limit these deformations. The size of the mechanism is further increased.

Le document EP 2 897 002 A2 décrit un mécanisme de rattrapante selon le préambule de la revendication indépendante 1, et comportant aussi un mécanisme d'isolation à diaphragme.The document EP 2 897 002 A2 describes a split-second mechanism according to the preamble of independent claim 1, and also comprising a diaphragm isolation mechanism.

Le but de la présente invention est de réaliser un mécanisme de rattrapante à isolation qui obvie aux inconvénients précités. En particulier, le but de la présente invention est de réaliser un mécanisme de rattrapante à isolation qui soit moins encombrant que les mécanismes de rattrapante à isolation connus, de préférence qui ne soit pas plus encombrant qu'un mécanisme de rattrapante classique sans isolation et qui permette de réduire les efforts et les déformations sur l'axe de rattrapante lors de l'isolation du levier de rattrapante.The object of the present invention is to provide a split-back insulating mechanism which overcomes the aforementioned drawbacks. In particular, the object of the present invention is to provide an insulated split-back mechanism which is less bulky than known insulated split-back mechanisms, preferably which is not more bulky than a conventional split-slip mechanism without insulation and which reduces the forces and deformations on the split-second axis when isolating the split-lever.

La présente invention a pour objet un mécanisme de rattrapante tel que défini dans la revendication indépendante 1. Des formes d'exécution préférées sont définies dans les revendications dépendantes 2 à 13.The subject of the present invention is a catch-up mechanism as defined in independent claim 1. Preferred embodiments are defined in dependent claims 2 to 13.

Enfin, comme défini dans la revendication 14, la présente invention a également pour objet un mécanisme de chronographe muni d'un mécanisme de rattrapante tel que ci-dessus.Finally, as defined in claim 14, the present invention also relates to a chronograph mechanism provided with a split-seconds mechanism as above.

Les figures annexées illustrent schématiquement une forme d'exécution d'un mécanisme de rattrapante selon l'invention.

  • Les figures 1 à 4 illustrent le mécanisme de rattrapante selon une forme d'exécution de l'invention dans une position de repos, vu de dessus, de dessous, en vue éclatée et en perspective respectivement.
  • La figure 5 illustre le mécanisme de rattrapante selon une forme d'exécution de l'invention dans une première phase de blocage.
  • La figure 6 illustre le mécanisme de rattrapante selon une forme d'exécution de l'invention dans une deuxième phase marquant le début de l'isolation.
  • La figure 7a illustre le mécanisme de rattrapante selon une forme d'exécution de l'invention dans une troisième phase d'isolation complète.
  • La figure 7b illustre le mécanisme de rattrapante selon une forme d'exécution de l'invention après isolation complète du levier de rattrapante.
  • La figure 8 illustre le mécanisme de rattrapante selon une forme d'exécution de l'invention dans un cas particulier de la troisième phase d'isolation.
  • Les figures 9 à 12 illustrent chacune le mécanisme de rattrapante selon une forme d'exécution de l'invention dans un cas limite de la troisième phase d'isolation.
The appended figures schematically illustrate an embodiment of a split-second mechanism according to the invention.
  • The figures 1 to 4 illustrate the split-second mechanism according to an embodiment of the invention in a rest position, seen from above, from below, in exploded view and in perspective respectively.
  • The figure 5 illustrates the split-second mechanism according to one embodiment of the invention in a first blocking phase.
  • The figure 6 illustrates the split-second mechanism according to an embodiment of the invention in a second phase marking the start of the insulation.
  • The figure 7a illustrates the split-second mechanism according to an embodiment of the invention in a third phase of complete isolation.
  • The figure 7b illustrates the split-second mechanism according to an embodiment of the invention after complete isolation of the split-lever.
  • The figure 8 illustrates the split-second mechanism according to an embodiment of the invention in a particular case of the third isolation phase.
  • The Figures 9 to 12 each illustrate the split-second mechanism according to one embodiment of the invention in a borderline case of the third isolation phase.

Le mécanisme de rattrapante selon la présente invention est un mécanisme de rattrapante à isolation destiné à équiper un mécanisme de chronographe traditionnel. De manière connue, le mécanisme de chronographe comprend notamment une roue de chronographe et un cœur de chronographe solidaire d'un axe de chronographe. Ledit axe de chronographe porte encore une aiguille de chronographe. Ces éléments (non illustrés) font partie d'un mécanisme de chronographe traditionnel et ne seront pas décrits plus en détail ici.The split-seconds mechanism according to the present invention is an insulated split-seconds mechanism intended to equip a traditional chronograph mechanism. In known manner, the chronograph mechanism comprises in particular a chronograph wheel and a chronograph heart secured to a chronograph axis. Said chronograph axis still carries a chronograph hand. These elements (not shown) are part of a traditional chronograph mechanism and will not be described in more detail here.

En particulier, le mécanisme de rattrapante comprend un cœur de rattrapante 1 chassé sur l'axe de chronographe du mécanisme de chronographe et une roue de rattrapante 3 dont l'axe de rattrapante 2 pivote traditionnellement dans ledit axe de chronographe.In particular, the split-second mechanism comprises a split-heart 1 driven on the chronograph axis of the chronograph mechanism and a split-wheel 3 whose split-second axis traditionally pivots in said chronograph axis.

Sur la roue de rattrapante 3 est pivoté un levier de rattrapante 4. Par exemple et comme illustré aux figures, le levier de rattrapante 4 peut être monté pivotant autour d'un premier tenon 5 lui-même chassé dans la roue de rattrapante 3.On the split-second wheel 3 is pivoted a split-lever 4. For example and as illustrated in the figures, the split-lever 4 can be pivotally mounted around a first lug 5 which is itself driven into the split-wheel 3.

De manière traditionnelle, l'axe de rattrapante 2 de la roue de rattrapante 3 porte une aiguille de rattrapante (non illustrée) qui, vue du côté cadran du mécanisme de chronographe, est placée sur l'aiguille de chronographe.Traditionally, the split-second axis 2 of the split-second wheel 3 carries a split-second hand (not shown) which, viewed from the dial side of the chronograph mechanism, is placed on the chronograph needle.

Le levier de rattrapante 4 comporte un premier bras 6 portant à son extrémité un tenon 7 destiné à coopérer avec l'extrémité libre 8 d'un ressort de rappel de levier de rattrapante 9 fixé dans la planche de la roue de rattrapante 3 au moyen d'une vis 10 par exemple.The split-second lever 4 comprises a first arm 6 carrying at its end a tenon 7 intended to cooperate with the free end 8 of a split-lever lever return spring 9 fixed in the plank of the split-wheel 3 by means of 'a screw 10 for example.

Le levier de rattrapante 4 comporte encore un second bras 11 dont l'extrémité active 12 est destinée à coopérer avec le cœur de rattrapante 1. Dans la forme d'exécution illustrée, l'extrémité active 12 du levier de rattrapante 4 présente une portion plane 15 perpendiculaire au plan dudit levier 4. L'extrémité active 12 porte un galet d'indexage 16 monté pivotant autour d'une première cheville 17 elle-même chassée dans ladite extrémité active 12. Ladite première cheville 17 forme un axe de rotation perpendiculaire au plan du levier de rattrapante 4 pour le galet d'indexage 16 et est chassée dans ledit levier 4 de sorte que ledit galet d'indexage 16 dépasse sensiblement de la portion plane 15 dans l'axe longitudinal du levier et de sorte que la portion plane 15 s'étende sensiblement de part et d'autre dudit galet d'indexage 16. La portion plane 15 peut être constituée d'une face plane venue d'une pièce, comme une tuile ou une palette en rubis par exemple ou de deux faces planes placées de part et d'autre du galet d'indexage 16. Les références 15 à 17 sont illustrées sur la figure 1 uniquement. Seule la référence 12 indiquant l'extrémité active du levier de rattrapante 4 est illustrée sur le reste des figures. Il est évident que l'extrémité active 12 du levier de rattrapante 4 pourrait avoir toute autre forme appropriée.The split-second lever 4 also has a second arm 11 whose active end 12 is intended to cooperate with the split-back core 1. In the illustrated embodiment, the active end 12 of the split-back lever 4 has a flat portion 15 perpendicular to the plane of said lever 4. The active end 12 carries an indexing roller 16 pivotally mounted around a first peg 17 itself driven into said active end 12. Said first peg 17 forms an axis of rotation perpendicular to the plane of the split-second lever 4 for the indexing roller 16 and is driven into said lever 4 so that said indexing roller 16 projects substantially from the planar portion 15 in the longitudinal axis of the lever and so that the planar portion 15 extends substantially on either side of said indexing roller 16. The flat portion 15 may consist of a flat face coming from a part, such as a tile or a ruby palette for example or of them flat faces placed on either side of the indexing roller 16. References 15 to 17 are illustrated on the figure 1 only. Only the reference 12 indicating the active end of the split-back lever 4 is illustrated in the rest of the figures. It is obvious that the active end 12 of the split-second lever 4 could have any other suitable shape.

Le mécanisme de rattrapante selon l'invention comprend en outre de manière traditionnelle des pinces de blocage 18 destinées à coopérer avec la roue de rattrapante 3 pour bloquer et libérer celle-ci. Les pinces de blocage 18 comprennent par exemple deux bras de blocage concourants et pivotant en leur point d'intersection A sur un pont du mouvement de chronographe entre une première position ouverte dans laquelle la roue de rattrapante 3 est libre (figures 1 à 4) et une seconde position fermée dans laquelle les pinces de blocage 18 coopèrent avec la roue de rattrapante 3 pour immobiliser celle-ci. De manière connue, l'extrémité libre des pinces de blocage 18 est destinée à coopérer avec la denture de la roue de rattrapante 3 pour immobiliser celle-ci dans la position fermée desdites pinces de blocage 18. Pour ce faire, ladite extrémité libre des pinces de blocage 18 peut présenter un profil cranté comme illustré aux figures.The split-second mechanism according to the invention also conventionally comprises locking clamps 18 intended to cooperate with the split-second wheel 3 to block and release the latter. The locking clamps 18 comprise for example two concurrent locking arms and pivoting at their point of intersection A on a bridge of the chronograph movement between a first open position in which the split-second wheel 3 is free ( figures 1 to 4 ) and a second closed position in which the locking clamps 18 cooperate with the split-second wheel 3 to immobilize the latter. In known manner, the free end of the locking clamps 18 is intended to cooperate with the teeth of the split-second wheel 3 to immobilize the latter in the closed position of said locking clamps 18. To do this, said free end of the clamps blocking 18 may have a notched profile as illustrated in the figures.

Dans la forme d'exécution illustrée, les pinces de blocage 18 sont solidaires d'une paire de becs 19 pivotant également en A et agencés pour coopérer avec une roue à colonnes de rattrapante 20 pour commander le pivotement des pinces de blocage 18. Lorsque les becs 19 sont en appui contre des colonnes de la roue à colonnes de rattrapante 20, les pinces de blocage 18 sont en position ouverte (figures 1 à 4) tandis que lorsque les becs 19 se trouvent entre les colonnes de la roue à colonnes de rattrapante 20, les pinces de blocages 18 sont en position fermée et la roue de rattrapante 3 immobilisée (figures 5 à 12).In the illustrated embodiment, the locking clamps 18 are integral with a pair of spouts 19 also pivoting at A and arranged to cooperate with a split-column wheel 20 to control the pivoting of the locking clamps 18. When the spouts 19 are in abutment against columns of the split-column wheel 20, the locking clamps 18 are in the open position ( figures 1 to 4 ) while when the spouts 19 are between the columns of the split-seat column wheel 20, the locking pliers 18 are in the closed position and the split-back wheel 3 immobilized ( Figures 5 to 12 ).

La roue à colonnes de rattrapante 20 est montée pivotante sur un pont ou la platine du mécanisme de chronographe et est commandée par un mécanisme de commande (non illustré) qui peut être actionné par l'utilisateur au moyen d'un poussoir par exemple, lorsque ce dernier veut mesurer un temps intermédiaire ou rattraper la mesure de l'aiguille de chronographe. Ce mécanisme de commande n'est pas illustré et ne sera pas décrit plus en détail.The split-seconds column wheel 20 is pivotally mounted on a bridge or the plate of the chronograph mechanism and is controlled by a control mechanism (not illustrated) which can be actuated by the user by means of a push-button for example, when the latter wants to measure an intermediate time or catch up with the measurement of the chronograph hand. This control mechanism is not illustrated and will not be described in more detail.

Le mécanisme de rattrapante selon l'invention comprend en outre un mécanisme d'isolation qui fait la particularité de l'invention. Ce mécanisme d'isolation comprend des pinces d'isolation 21. Dans la forme d'exécution illustrée, les pinces d'isolation 21 sont formées de deux bras concourants et pivotés en leur intersection sur un pont ou la platine du mécanisme de chronographe.The split-second mechanism according to the invention further comprises an isolation mechanism which makes the particularity of the invention. This isolation mechanism includes isolation clips 21. In the illustrated embodiment, the insulation clips 21 are formed by two concurrent arms and pivoted at their intersection on a bridge or the plate of the chronograph mechanism.

Les bras des pinces d'isolation 21 sont agencés pour pivoter entre une première position ouverte (les deux bras des pinces d'isolation sont écartés l'un de l'autre) et une seconde position fermée (les deux bras des pinces d'isolation sont rapprochés l'un de l'autre). Dans leur position fermée, les pinces d'isolation 21 coopèrent avec le levier de rattrapante 4 pour le faire pivoter dans une position dans laquelle il n'est plus en contact avec le cœur de rattrapante 1 quelle que soit la position dudit cœur de rattrapante 1. Dans cette position fermée des pinces d'isolation 21, le levier de rattrapante 4 est donc isolé du cœur de rattrapante 1 qui peut pivoter sans entrer en contact avec ledit levier de rattrapante 4.The arms of the isolation clamps 21 are arranged to pivot between a first open position (the two arms of the isolation clamps are separated from one another) and a second closed position (the two arms of the isolation clamps are close to each other). In their closed position, the insulation clamps 21 cooperate with the split-back lever 4 to rotate it into a position in which it is no longer in contact with the split-back heart 1 whatever the position of said split-back heart 1 In this closed position of the insulation clamps 21, the split-back lever 4 is therefore isolated from the split-back heart 1 which can pivot without coming into contact with said split-back lever 4.

Dans la forme d'exécution illustrée, les pinces d'isolation 21 sont pivotées en A concentriquement aux pinces de blocage 18 et chacun des bras formant les pinces d'isolation 21 est venu d'une pièce avec un des becs 19. De plus, dans la forme d'exécution illustrée, les pinces de blocage 18 sont flexibles et sont portées par les pinces d'isolation 21. Dans les figures, chacun des bras des pinces de blocage 18 est fixé à un bras des pinces d'isolation 21 au moyen de deux chevilles 18b par exemple.In the illustrated embodiment, the isolation clamps 21 are pivoted at A concentrically with the locking clamps 18 and each of the arms forming the isolation clamps 21 came in one piece with one of the spouts 19. In addition, in the illustrated embodiment, the locking clips 18 are flexible and are carried by the isolation clips 21. In the figures, each of the arms of the locking clips 18 is fixed to an arm of the isolation clips 21 to the by means of two pegs 18b for example.

Selon la forme d'exécution illustrée de l'invention, chacun des bras des pinces d'isolation 21 présente une extrémité active 22 de forme circulaire et les pinces d'isolation 21 sont agencées de manière à ce que lesdites extrémités actives 22 soient concentriques à l'axe de rattrapante 2 lorsque les pinces d'isolation 21 sont dans leur seconde position fermée.According to the illustrated embodiment of the invention, each of the arms of the isolation clamps 21 has an active end 22 of circular shape and the isolation clamps 21 are arranged so that said active ends 22 are concentric with split-second axis 2 when the insulation clips 21 are in their second closed position.

Le levier de rattrapante 4 comprend une protubérance agencée pour coopérer avec les pinces d'isolation 21 dans leur position fermée de sorte qu'un appui des pinces d'isolation 21 sur la protubérance entraîne le pivotement du levier de rattrapante 4 dans une position dans laquelle il n'est plus en contact avec le cœur de rattrapante 1. Dans la forme d'exécution illustrée, la protubérance est un premier galet d'isolation 13 monté pivotant sur le premier bras 6 dudit levier de rattrapante 4. Ainsi, lorsque les pinces d'isolation 21 pivotent dans leur position fermée, elles viennent en appui contre le premier galet d'isolation 13 et entraînent le pivotement du levier de rattrapante 4 autour du premier tenon 5, ledit levier 4 s'éloignant alors du cœur de rattrapante 1.The split-back lever 4 comprises a protuberance arranged to cooperate with the isolation clamps 21 in their closed position so that a pressing of the isolation clamps 21 on the protrusion causes the tilting lever 4 to pivot in a position in which it is no longer in contact with the split-second core 1. In the illustrated embodiment, the protuberance is a first insulating roller 13 pivotally mounted on the first arm 6 of said lever. split-second 4. Thus, when the insulation clamps 21 pivot in their closed position, they bear against the first insulation roller 13 and cause the split-second lever 4 to pivot around the first tenon 5, said lever 4 s' away from the split-second heart 1.

Pour assurer le contact entre les pinces d'isolation 21 et le premier galet d'isolation 13 du levier de rattrapante 4 lorsque les pinces d'isolation 21 sont en position fermée, lesdites pinces d'isolation 21 sont soumises à l'action d'une force élastique qui tend à les déplacer dans leur position fermée. Dans la forme d'exécution illustrée, la force élastique est constituée d'un ressort d'isolation 23 pivoté en A concentriquement aux pinces d'isolation 21 et comprenant deux bras élastique agissant respectivement chacun sur un bras des pinces d'isolation 21.To ensure contact between the insulation clamps 21 and the first insulation roller 13 of the split-second lever 4 when the insulation clamps 21 are in the closed position, said insulation clamps 21 are subjected to the action of an elastic force which tends to move them into their closed position. In the illustrated embodiment, the elastic force consists of an insulation spring 23 pivoted at A concentrically with the insulation clips 21 and comprising two elastic arms each acting respectively on one arm of the insulation clips 21.

Le fonctionnement du mécanisme de rattrapante et notamment du mécanisme d'isolation selon l'invention est décrit en détail dans la suite en référence aux figures 1 à 12.The operation of the split-second mechanism and in particular of the isolation mechanism according to the invention is described in detail below with reference to Figures 1 to 12 .

Les figures 1 à 4 illustrent le mécanisme de rattrapante au repos c'est-à-dire lorsque l'aiguille de rattrapante et l'aiguille de chronographe sont superposées.The figures 1 to 4 illustrate the split-seconds mechanism at rest, that is to say when the split-seconds hand and the chronograph hand are superimposed.

Dans cette position de repos, les becs 19 sont chacun en appui contre une colonne de la roue à colonnes de rattrapante 20. Les pinces de blocage 18 et les pinces d'isolation 21 sont dans leur position ouverte. Le levier de rattrapante 4 est en appui sur le cœur de rattrapante 1, le galet d'indexage 16 se trouvant dans le creux entre les épaulements 1 b du cœur de rattrapante 1 tandis que les portions planes 15 de l'extrémité active 12 dudit levier de rattrapante 4 sont en appui sur lesdits épaulements 1b, garantissant ainsi l'indexation de l'aiguille de rattrapante avec l'aiguille de chronographe.In this rest position, the spouts 19 are each in abutment against a column of the split-seat column wheel 20. The locking clamps 18 and the insulation clamps 21 are in their open position. The split-second lever 4 is supported on the split-core 1, the indexing roller 16 located in the hollow between the shoulders 1b of the split-core 1 while the flat portions 15 of the active end 12 of said lever split-second 4 are supported on said shoulders 1b, thus guaranteeing the indexing of the split-second hand with the chronograph hand.

Dans cette position de repos, l'aiguille de rattrapante est donc superposée à l'aiguille de chronographe et suit les mouvements de celle-ci (mise en marche, arrêt, remise à zéro).In this rest position, the split-seconds hand is therefore superimposed on the chronograph hand and follows the movements of the latter (switching on, off, reset).

Sur commande de l'utilisateur qui veut mesurer un temps intermédiaire, la roue à colonnes de rattrapante 20 pivote d'un pas. Les becs 19 tombent alors chacun dans un espace entre deux colonnes de ladite roue à colonnes de rattrapante 20 (figure 5). La chute des becs 19 entraîne le pivotement des pinces de blocage 18 et des pinces d'isolation 21 depuis leur position ouverte dans leur position fermée.On command of the user who wants to measure an intermediate time, the split-column wheel 20 pivots by one step. The spouts 19 then each fall into a space between two columns of said split-seat column wheel 20 ( figure 5 ). The fall of the spouts 19 causes the locking clips 18 and the isolation clips 21 to pivot from their open position to their closed position.

Le mécanisme de rattrapante selon l'invention est agencé pour que le blocage de la roue de rattrapante 3 et l'isolation du levier de rattrapante 4 se fasse en deux phases successives, les pinces de blocage 18 atteignant leur position fermée avant que les pinces d'isolation 21 n'atteignent la leur. Ainsi, dans une première phase de blocage illustrée à la figure 5, les pinces de blocage 18 ont déjà atteint leur position fermée, immédiatement après le début de la chute des becs 19 entre les colonnes de la roue à colonnes 20 et immobilisent donc la roue de rattrapante 3 alors que les pinces d'isolation 21 n'ont pas encore fait pivoter le levier de rattrapante 4. Dès cette première phase de blocage, l'aiguille de rattrapante est stoppée. Cela permet d'éviter des déphasages ou soubresauts de l'aiguille de rattrapante par rapport à l'aguille de chronographe. Ce genre de déphasages ou sauts en avant de l'aiguille de rattrapante par rapport à l'aiguille de chronographe peuvent se produire dans le cas où le levier de rattrapante serait isolé avant ou simultanément au blocage de la roue de rattrapante : dans ce cas, durant un bref instant, la roue de rattrapante n'est plus liée au mobile de chronographe et l'aiguille de rattrapante est donc libre de toute rotation.The split-second mechanism according to the invention is arranged so that the locking of the split-wheel 3 and the isolation of the split-lever 4 takes place in two successive phases, the locking clamps 18 reaching their closed position before the clamps d insulation 21 does not reach theirs. Thus, in a first blocking phase illustrated in the figure 5 , the locking clamps 18 have already reached their closed position, immediately after the start of the fall of the spouts 19 between the columns of the column wheel 20 and therefore immobilize the split-second wheel 3 while the isolation clamps 21 do not have not yet pivoted the catch-up lever 4. As of this first blocking phase, the catch-up needle is stopped. This avoids phase shifts or jolts of the split-second hand relative to the chronograph hand. This type of phase shift or leaps forward of the split-second hand relative to the chronograph hand can occur in the case where the split-second lever is isolated before or simultaneously with the locking of the split-second wheel: in this case, for a short time, the split-second wheel is no longer linked to the chronograph mobile and the split-second hand is therefore free to rotate.

Dans une seconde phase marquant le début de l'isolation et illustrée à la figure 6, les becs 19 poursuivent leur chute entre les colonnes de la roue à colonnes de rattrapante 20 et les pinces d'isolation 21 poursuivent leur rotation pour atteindre leur position fermée dans laquelle elles sont en appui contre le premier galet d'isolation 13 du levier de rattrapante 4 et font pivoter ledit levier. Le levier de rattrapante 4 commence donc à s'éloigner du cœur de rattrapante 1. La roue de rattrapante 3 est toujours bloquée par les pinces de blocage 18. Dans la forme d'exécution illustrée, la flexibilité desdites pinces de blocage 18 compense leur rotation supplémentaire (puisqu'elles sont portées par les pinces d'isolation 21) et leur permet de rester en appui contre la roue de rattrapante 3 sans risque de casse même si la force radiale des pinces de blocage 18 sur la roue de rattrapante 3 augmente.In a second phase marking the beginning of the isolation and illustrated on the figure 6 , the spouts 19 continue their fall between the columns of the split-column wheel 20 and the insulating clamps 21 continue their rotation to reach their closed position in which they are pressed against the first insulating roller 13 of the lever split-second 4 and rotate said lever. The split-second lever 4 therefore begins to move away from the split-heart 1. The split-wheel 3 is always locked by the locking pliers 18. In the illustrated embodiment, the flexibility of said locking clamps 18 compensates for their additional rotation (since they are carried by the isolation clamps 21) and allows them to remain in abutment against the split-second wheel 3 without risk of breakage even if the radial force of the locking clamps 18 on the split-second wheel 3 increases.

Enfin, le mécanisme de rattrapante atteint sa position de blocage et d'isolation complète lors d'une troisième phase illustrée à la figure 7a. Suite à la chute des becs 19 entre les colonnes de la roue à colonnes de rattrapante 20, les pinces d'isolation 21 pivotent jusqu'à ce qu'elles arrivent en butée contre deux excentriques 24. Cette position en butée contre les excentriques 24 correspond alors à la position fermée des pinces d'isolation 21 et des pinces de blocage 18. La position des excentriques 24 peut être réglée pour que dans cette position fermée des pinces d'isolation 21, le levier de rattrapante 4 se trouve dans une position dans laquelle il est complétement isolé du cœur de rattrapante 1 qui peut pivoter librement sans contact avec l'extrémité active 12 du levier de rattrapante 4 et son galet d'indexage 16 en particulier. Comme il est visible dans la figure 7b, dans cette position d'isolation complète du levier de rattrapante 4, même la pointe 1a du cœur de rattrapante 1 n'entre pas en contact avec le levier de rattrapante 4. Bien entendu, dans cette position d'isolation compète, la roue de rattrapante 3 est toujours bloquée par les pinces de blocage 18.Finally, the split-second mechanism reaches its blocking and complete isolation position during a third phase illustrated in figure 7a . Following the fall of the spouts 19 between the columns of the split-second column wheel 20, the isolation clamps 21 pivot until they come into abutment against two eccentrics 24. This position in abutment against the eccentrics 24 corresponds then in the closed position of the isolation clamps 21 and the locking clamps 18. The position of the eccentrics 24 can be adjusted so that in this closed position of the isolation clamps 21, the catch-up lever 4 is in a position in which it is completely isolated from the split-heart 1 which can pivot freely without contact with the active end 12 of the split-lever 4 and its indexing roller 16 in particular. As it is visible in the figure 7b , in this position of complete isolation of the split-second lever 4, even the point 1a of the split-second heart 1 does not come into contact with the split-back lever 4. Of course, in this complete isolation position, the wheel of split-second 3 is always blocked by the locking clamps 18.

A nouveau sur commande de l'utilisateur, le mécanisme de rattrapante peut être remis à zéro par rapport à l'aiguille de chronographe, c'est-à-dire que l'aiguille de rattrapante peut être ramenée dans sa position indexée dans laquelle elle est superposée à l'aiguille de chronographe.Again at the user's command, the split-seconds mechanism can be reset to zero relative to the chronograph hand, i.e. the split-second needle can be returned to its indexed position in which it is superimposed on the chronograph hand.

L'actionnement du mécanisme de commande par l'utilisateur entraîne la rotation d'un pas de la roue à colonnes de rattrapante 20. Les becs 19 sortent de leur logement entre deux colonnes pour revenir chacun en appui sur une colonne de la roue à colonnes de rattrapante 20. Les pinces de blocage 18 et les pinces d'isolation 21 pivotent alors et retrouvent leur position ouverte. Comme lors de la mesure d'un temps intermédiaire décrit ci-dessus, le réindexage de l'aiguille de rattrapante sur l'aiguille de chronographe se fait en deux étapes. D'abord, les pinces d'isolation 21 libèrent le levier de rattrapante 4 qui revient au contact du cœur de rattrapante 1 sous l'action de son ressort de rappel 9. Ensuite, les pinces de blocage 18 libèrent la roue de rattrapante 3. L'extrémité active 12 du levier de rattrapante 4 qui est en contact avec le cœur de rattrapante 1, roule (ou glisse) sur celui-ci jusqu'à ce que le galet d'indexage 16 tombe dans le creux entre les épaulements 1b dudit cœur de rattrapante 1 et que la portion plane 15 coopère avec lesdits épaulements 1b. Le mécanisme de rattrapante a retrouvé sa position de repos et l'aiguille de rattrapante et l'aiguille de chronographe sont à nouveau superposées.The actuation of the control mechanism by the user causes the pitching wheel of the split-second column wheel to rotate one pitch. The spouts 19 come out of their housing between two columns to return each to rest on a column of the column wheel split-second 20. The locking clips 18 and the insulation clips 21 then pivot and return to their open position. As during the measurement of an intermediate time described above, the reindexing of the split-seconds hand on the chronograph hand is done in two stages. First, the isolation clamps 21 release the split-lever 4 which returns to contact with the split-core 1 under the action of its return spring 9. Then, the locking clamps 18 release the split-wheel 3. The active end 12 of the catch-up lever 4 which is in contact with the catch-up heart 1, rolls (or slides) thereon until the indexing roller 16 falls into the hollow between the shoulders 1b of said split-second heart 1 and that the flat portion 15 cooperates with said shoulders 1b. The split-second mechanism has returned to its rest position and the split-second hand and the chronograph hand are again superimposed.

Dans la forme d'exécution illustrée, les pinces d'isolation 21 et leur extrémité active circulaire 22 ne forment pas un cercle complet autour de la roue de rattrapante 3 lorsque lesdites pinces d'isolation 21 sont dans leur position fermée. Il existe deux zones critiques, appelées zones mortes C, D entre les extrémités actives 22 des pinces d'isolation 21. Si, au moment de l'arrêt de la rattrapante (mesure d'un temps intermédiaire), la roue de rattrapante 3 se trouve dans une position telle que le premier galet d'isolation 13 du levier de rattrapante 4 se situe dans une des zones mortes C, D, alors les pinces d'isolation 21 n'entreront pas en contact avec ledit premier galet d'isolation 13 et le levier de rattrapante 4 ne pivotera pas dans sa position d'isolation éloignée du cœur de rattrapante 1 même dans la position fermée des pinces d'isolation 21.In the illustrated embodiment, the insulation clips 21 and their circular active end 22 do not form a complete circle around the split-second wheel 3 when said insulation clips 21 are in their closed position. There are two critical zones, called dead zones C, D between the active ends 22 of the isolation clamps 21. If, when the split-second stops (measurement of an intermediate time), the split-wheel 3 is in a position such that the first insulation roller 13 of the split-second lever 4 is located in one of the dead zones C, D, then the insulation clamps 21 will not come into contact with said first insulation roller 13 and the split-second lever 4 will not pivot in its insulation position remote from the split-second heart 1 even in the closed position of the isolation clamps 21.

Pour garantir une isolation complète, même dans ce cas critique, le mécanisme d'isolation du mécanisme de rattrapante selon la forme d'exécution illustrée comprend en outre un levier d'isolation 25 pivoté sur la roue de rattrapante 3. Par exemple et comme illustré aux figures, le levier d'isolation 25 peut être monté pivotant autour d'un deuxième tenon 26 lui-même chassé dans la roue de rattrapante 3.To guarantee complete isolation, even in this critical case, the isolation mechanism of the split-second mechanism according to the illustrated embodiment further comprises an isolation lever 25 pivoted on the split-wheel 3. For example and as illustrated in the figures, the isolation lever 25 can be pivotally mounted around a second tenon 26 which is itself driven into the split-second wheel 3.

Le levier d'isolation 25 porte à une première extrémité une goupille d'isolation 27 agencée pour se déplacer dans une lumière 14 pratiquée dans le second bras 11 du levier de rattrapante 4. L'autre extrémité du levier d'isolation 25 présente une protubérance qui dans la forme d'exécution illustrée est constituée par un second galet d'isolation 28 pivoté sur ledit levier d'isolation 25. Comme le premier galet d'isolation 13, le second galet d'isolation 28 est agencé pour coopérer avec les pinces d'isolation 21 dans leur position fermée. En outre, le levier d'isolation 25, sa goupille d'isolation 27 et la lumière 14 prévue sur le levier de rattrapante 4 sont agencés de sorte qu'un appui des pinces d'isolation 21 sur le second galet d'isolation 28 entraîne le pivotement du levier d'isolation 25 autour du second tenon 26 et le pivotement du levier de rattrapante 4 dans une position dans laquelle ce dernier n'est plus en contact avec le cœur de rattrapante 1.The isolation lever 25 carries at one end an isolation pin 27 arranged to move in a slot 14 formed in the second arm 11 of the split-back lever 4. The other end of the isolation lever 25 has a protuberance which in the illustrated embodiment consists of a second insulation roller 28 pivoted on said insulation lever 25. Like the first insulation roller 13, the second insulation roller 28 is arranged to cooperate with the clamps insulation 21 in their closed position. In addition, the isolation lever 25, its isolation pin 27 and the slot 14 provided on the flap lever 4 are arranged so that pressing the isolation clips 21 on the second isolation roller 28 causes the pivoting of the isolation lever 25 around the second tenon 26 and the pivoting of the split-second lever 4 in a position in which the latter is no longer in contact with the split-second heart 1.

Le levier d'isolation 25 et le levier de rattrapante 4, et en particulier les premiers et second galets d'isolation 13, 28, sont agencés de sorte qu'il y ait toujours au moins un des premier et second galets d'isolation 13, 28 en contact avec les pinces d'isolation 21 lorsque celles-ci sont dans leur position fermée. Ainsi, le levier de rattrapante 4 peut être isolé du cœur de rattrapante lors de la mesure d'un temps intermédiaire quelle que soit la position de la roue de rattrapante 3 lorsque celle-ci est bloquée par les pinces de blocage 18.The isolation lever 25 and the split-second lever 4, and in particular the first and second insulation rollers 13, 28, are arranged so that there is always at least one of the first and second insulation rollers 13 , 28 in contact with the insulation clips 21 when these are in their closed position. Thus, the catch-up lever 4 can be isolated from the catch-up heart during the measurement of an intermediate time whatever the position of the catch-up wheel 3 when the latter is locked by the locking clamps 18.

La figure 8 illustre le cas où au déclenchement du mécanisme de rattrapante (mesure d'un temps intermédiaire), la roue de rattrapante 3 et le levier de rattrapante 4 sont dans une position dans laquelle le premier galet d'isolation 13 se trouve dans la zone morte C et n'est donc pas atteignable par les pinces d'isolation 21 en position fermée. Dans ce cas, les pinces d'isolation 21 en pivotant dans leur position fermée viennent en contact avec le second galet d'isolation 28 ce qui fait pivoter le levier d'isolation 25. Le pivotement dudit levier d'isolation 25 entraîne le déplacement de la goupille d'isolation 27 dans la lumière 14 du levier de rattrapante 4 et par conséquent le pivotement dudit levier de rattrapante 4 dans une position dans laquelle il n'est plus en contact avec le cœur de rattrapante 1.The figure 8 illustrates the case where, when the split-seconds mechanism is triggered (measurement of an intermediate time), the split-wheel 3 and the split-lever 4 are in a position in which the first insulating roller 13 is in the dead zone C and therefore cannot be reached by the isolation clamps 21 in the closed position. In this case, the isolation clips 21 by pivoting in their closed position come into contact with the second isolation roller 28 which causes the isolation lever 25 to pivot. The pivoting of said isolation lever 25 causes the displacement of the insulation pin 27 in the slot 14 of the split-second lever 4 and consequently the pivoting of said lever split-second 4 in a position in which it is no longer in contact with the split-heart 1.

Comme illustré aux figures 9 à 12, de préférence, le levier de rattrapante 4, le levier d'isolation 25 et les premier et second galets d'isolation 13, 28 sont agencés pour que l'isolation ait lieu même lorsque l'un desdits premier et second galets d'isolation 13, 28 vient en appui à la limite d'une extrémité active 22 des pinces d'isolation 21 et donc à la limite d'une zone morte C ou D (premier galet d'isolation 13 en limite des pinces d'isolation 21 dans les figures 10 et 11, et second galet d'isolation 28 en limite des pinces d'isolation 21 dans les figures 9 et 12).As illustrated in Figures 9 to 12 , preferably, the split-second lever 4, the isolation lever 25 and the first and second insulation rollers 13, 28 are arranged so that the insulation takes place even when one of said first and second insulation rollers 13, 28 comes to bear at the limit of an active end 22 of the insulation clamps 21 and therefore at the limit of a dead zone C or D (first insulation roller 13 at the limit of the insulation clamps 21 in the figures 10 and 11 , and second insulating roller 28 at the limit of the insulating clamps 21 in the figures 9 and 12 ).

Dans la forme d'exécution décrite ci-dessus, les pinces d'isolation sont formées de deux bras concourants et pivotés en un même point qui est leur intersection. En variante, les pinces d'isolation pourraient comprendre deux bras concourants pivotés chacun en un point distinct et différent de leur intersection, sur un pont ou la platine du mécanisme de chronographe. De manière générale, les pinces d'isolations du mécanisme selon l'invention sont formées de deux bras concourants et qui peuvent être rapprochés l'un de l'autre pour venir coopérer avec et « saisir » le levier de rattrapante 4.In the embodiment described above, the insulation clips are formed of two concurrent arms and pivoted at the same point which is their intersection. As a variant, the isolation clips could comprise two concurrent arms each pivoted at a distinct point different from their intersection, on a bridge or the plate of the chronograph mechanism. In general, the insulating clamps of the mechanism according to the invention are formed by two concurrent arms which can be brought together to cooperate with and "grip" the split-back lever 4.

Dans la forme d'exécution décrite ci-dessus, les pinces d'isolation sont pivotées coaxialement aux pinces de blocage et sont commandées simultanément, les pinces de blocage étant portées par les pinces d'isolation. Il va de soi qu'en variante, les pinces d'isolation pourraient être pivotées en un autre point du mouvement, indépendamment des pinces de blocage. De même, lesdites pinces d'isolation pourraient être commandées par les pinces de blocage ou encore directement commandées par la roue à colonnes de rattrapante.In the embodiment described above, the isolation clamps are pivoted coaxially with the locking clamps and are controlled simultaneously, the locking clamps being carried by the isolation clamps. It goes without saying that, as a variant, the insulation clips could be pivoted at another point of the movement, independently of the locking clips. Likewise, said insulation clamps could be controlled by the locking clamps or even directly controlled by the split-column wheel.

D'autre part, les pinces de blocage sont bien connues de l'homme du métier et pourraient avoir toute forme appropriée à leur fonction et pourraient être totalement indépendantes des pinces d'isolation.On the other hand, the locking clips are well known to those skilled in the art and could have any shape suitable for their function and could be completely independent of the insulation clips.

De même, la forme de l'extrémité active du levier de rattrapante décrite ci-dessus est un exemple. Il est évident que ladite extrémité active et le levier de rattrapante pourraient avoir toute forme appropriée.Likewise, the shape of the active end of the flap lever described above is an example. It is obvious that said active end and the catch-up lever could have any suitable shape.

On réalise ainsi un mécanisme de rattrapante avec isolation qui permet de limiter voire supprimer les contraintes radiales sur l'axe de rattrapante en offrant une isolation concentrique par rapport à la roue de rattrapante. Il n'est ainsi plus nécessaire de faire pivoter l'axe de rattrapante dans un pont dédié ou entre deux ponts dédiés. De plus, le mécanisme de rattrapante selon l'invention permet une isolation complète du levier qui n'est plus du tout en contact avec le cœur de rattrapante lors de la mesure d'un temps intermédiaire ce qui permet de limiter la variation d'amplitude du mouvement (plus besoin de passer la pointe du cœur pour le levier de rattrapante). En outre, le mécanisme de rattrapante et son mécanisme d'isolation selon l'invention permettent de conserver les dimensions d'un mécanisme de rattrapante classique sans isolateur puisqu'en ne recourant pas à une roue d'isolation, aucune épaisseur supplémentaire n'est ajoutée au mécanisme (les pinces d'isolation travaillant dans l'épaisseur du levier de rattrapante). Enfin, le mécanisme de rattrapante selon l'invention est relativement compact en termes de pièces et d'encombrement et est facilement réglable.A split-seconds mechanism with insulation is thus produced which makes it possible to limit or even eliminate the radial stresses on the split-second axis by providing concentric insulation with respect to the split-second wheel. It is therefore no longer necessary to pivot the split-second axis in a dedicated bridge or between two dedicated bridges. In addition, the split-second mechanism according to the invention allows complete isolation of the lever which is no longer in contact with the split-second core during the measurement of an intermediate time, which makes it possible to limit the variation in amplitude. movement (no need to pass the tip of the heart for the split lever). In addition, the split-back mechanism and its isolation mechanism according to the invention make it possible to keep the dimensions of a conventional split-mechanism without an insulator since by not using an isolation wheel, no additional thickness is added to the mechanism (the insulation clips working in the thickness of the split-lever). Finally, the split-second mechanism according to the invention is relatively compact in terms of parts and size and is easily adjustable.

Claims (14)

  1. Flyback mechanism comprising a flyback wheel (3), a flyback lever (4) pivoted on the flyback wheel (3) and subjected to the action of a flyback spring (9) tending to hold said flyback lever (4) in contact with a flyback heart-piece (1) pivoted coaxially with the flyback wheel (3) and means (18) for blocking the flyback wheel (3) which are arranged to pivot between a first, inoperative position and a second, blocking position in which they block the flyback wheel (3), characterised in that the flyback mechanism further comprises isolation claws (21) formed from two converging arms each having an active end (22) intended to cooperate with the flyback lever (4), said isolation claws (21) being arranged so that the arms pivot between a first, inoperative position in which the flyback lever (4) is in contact with the flyback heart-piece (1) and a second, isolation position in which one of the active ends (22) of the isolation claws cooperates with the flyback lever (4) to cause it to pivot against the action of its flyback spring (9) into a position in which it is no longer in contact with the flyback heart-piece (1); and in that the blocking means (18) are arranged with respect to the isolation claws (21) in order to block the flyback wheel (3) before the isolation claws (21) come into contact with the flyback lever (4) when said isolation claws (21) pivot into their second, isolation position.
  2. Flyback mechanism as claimed in claim 1, characterised in that the arms of the isolation claws (21) are arranged to pivot at their intersection (A).
  3. Flyback mechanism as claimed in claim 1, characterised in that the arms of the isolation claws (21) are arranged to each pivot at a point distinct and different from their intersection.
  4. Flyback mechanism as claimed in any one of claims 2 or 3, characterised in that the blocking means (18) are pivoted coaxially with the point of intersection of the arms of the isolation claws (21).
  5. Flyback mechanism as claimed in any one of the preceding claims, characterised in that the active ends (22) of the isolation claws (21) are essentially circular in shape; and in that said active ends (22) are concentric with the flyback wheel (3) when the isolation claws are in their second, isolation position.
  6. Flyback mechanism as claimed in any one of the preceding claims, characterised in that the isolation claws (21) are subjected to the action of an isolation spring (23) tending to push them into their second, isolation position.
  7. Flyback mechanism as claimed in any one of the preceding claims, characterised in that, in their second, isolation position, the isolation claws (21) come into abutment against eccentrics (24) which are adjustable in position.
  8. Flyback mechanism as claimed in any one of the preceding claims, characterised in that the blocking means are blocking claws (18).
  9. Flyback mechanism as claimed in claim 7, characterised in that the blocking claws (18) are carried by the isolation claws (21).
  10. Flyback mechanism as claimed in claim 8, characterised in that the blocking claws (18) are flexible.
  11. Flyback mechanism as claimed in any one of the preceding claims, characterised in that the mechanism further comprises a flyback column wheel (20), the rotation of which controls the pivoting of the isolation claws (21) and/or of the blocking means (18).
  12. Flyback mechanism as claimed in any one of the preceding claims, characterised in that the mechanism further comprises an isolation lever (25) pivoted on the flyback wheel (3) and arranged to cooperate with the active ends (2) of the isolation claws (21) and with the flyback lever (4) so that the pivoting of the isolation lever (25) drives the pivoting of the flyback lever (4); and in that the isolation lever (25) is further arranged on the flyback wheel (3) so that, whatever the position of the flyback wheel (3) when the isolation claws (21) reach their second, isolation position, they come into contact via their active ends (22) either with the flyback lever (4) or with the isolation lever (25) or both in order to ensure that the flyback lever (4) is always pivoted into a position where it is no longer in contact with the flyback heart-piece (1).
  13. Flyback mechanism as claimed in any one of the preceding claims, characterised in that the flyback lever (4) comprises a first isolation roller (13) pivoted on said flyback lever (4) and intended to cooperate with the active end (22) of the isolation claws (21).
  14. Chronograph mechanism comprising a flyback mechanism as claimed in any one of claims 1 to 13.
EP16809185.8A 2015-12-09 2016-12-05 Split time counter mechanism Active EP3387495B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15198586 2015-12-09
PCT/IB2016/057346 WO2017098394A1 (en) 2015-12-09 2016-12-05 Flyback mechanism

Publications (2)

Publication Number Publication Date
EP3387495A1 EP3387495A1 (en) 2018-10-17
EP3387495B1 true EP3387495B1 (en) 2020-03-11

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Application Number Title Priority Date Filing Date
EP16809185.8A Active EP3387495B1 (en) 2015-12-09 2016-12-05 Split time counter mechanism

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EP (1) EP3387495B1 (en)
WO (1) WO2017098394A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US253338A (en) * 1882-02-07 audemars
JPS5041917Y1 (en) * 1970-03-28 1975-11-28
CH679969B5 (en) * 1990-12-11 1992-11-30 Ebauchesfabrik Eta Ag
CH709153A1 (en) * 2014-01-16 2015-07-31 Richemont Int Sa Mechanism to split insulation and mechanical timepiece having a chronograph mechanism provided with this mechanism to split insulation.

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* Cited by examiner, † Cited by third party
Title
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EP3387495A1 (en) 2018-10-17

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